jquery 有关问题求解！

[color=#FF0000]var ActionItemModule = (function () {[/color]    var newAIID = 0; //new action item id    var dataReadyFlag = false;    return {      [color=#FF0000]  setData:[/color] function (data) {            setActionItems(data["actionitems"]);        },        [color=#FF0000]getData:[/color] function () {            return getActionItems();        },       [color=#FF0000] validateData:[/color] function () {            return checkActionItems();        },        addRow: function () {            addActionItem();        },        removeRow: function () {            removeActionItem();        },        setWorkMode: function (mode) {            if (!dataReadyFlag) {                setTimeout("ActionItemModule.setWorkMode('" + mode + "')", 500);                return;            }            doSetWorkMode(mode);        }    };

打个比方：var jQuerys = (function () {    return { setData: function () { alert("11111") } }})();alert(jQuerys.setData());//你看下 这个就可以好理解啦吧